Attach the following:
- Both pages of Form 1040 and Schedule A and Schedule D, if applicable, for the year in which the loss or credit originated. Write "Attachment to Form 1040-X--Copy Only--Do Not Process" at the top of these forms.
- Any Schedule K-1s you received from any partnership, S corporation, estate, or trust for the year of the loss or credit that contributed to the loss or credit carryback.
- Any form or schedule from which the carryback results.
- Forms or schedules for items refigured in the carryback year.